Cylinder-bank skids: a practical answer for supplementary city gas
Unstable pipeline pressure, weak supply at network ends, remote restaurants with no mains at all — cylinder-bank skids are built for exactly these cases.
City gas is traditionally delivered by pipeline: storage and transmission stations, city gates, regulating stations, trunk and branch lines feeding end users. In towns where supply pressure is stable and demand roughly matches supply, this works.
In recent years, however, tighter environmental rules have pushed large numbers of boilers from coal to gas, and the supply-demand gap has become visible in cities. Every winter peak, many places curb industrial users to protect households; restaurants in remote, difficult terrain near forests still burn LPG cylinders because running a network there means heavy investment, landslide risk and hard maintenance; and housing estates at the end of the network around major cities have seen organised complaints when winter supply falters.
What these cases share is that the network either cannot reach the site or cannot supply enough when it does. That is the value of the cylinder-bank skid — CNG cylinders plus reduction and metering. CNG arrives by tube trailer, the bank buffers storage, the reducing skid takes 20 MPa down to utilisation pressure, and a single point-supply station can cover a housing estate, a factory or a cluster of restaurants.
Selection turns on three questions: how much storage the peak-shaving window needs, which determines the number of cylinders; what footprint the site allows, which decides vertical or horizontal arrangement; and whether the filling connection matches the station, which decides the manifold arrangement.
Written by the Tairan engineering team from project records and standard documents. Please cite the source when quoting.